Pencil-sharpener.



No. 803,762. PATENTBD NOV. 7, 1905. W. B. HOPKINS.

. PENCIL SHARPENER.

APPLICATION FILED JUNE 6. 1905.

LUE-lineman UNITED STATES PATENT OFFICE.

PENCIL-SHARPENER.

Specification of Letters Patent.

Patented Nov. 7, 1905.

Application filed June 6, 1905. Serial No. 264,027.

To aZZ whom it may concern.-

Be it known that I, WILLIAM B. HOPKINS, of Cincinnati, in the county ofHamilton, and in the State of Ohio, have invented a certain new anduseful Improvement in Pencil-Sharpeners; and I do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, in which- Figure 1 is aperspective view of a pencilsharpener embodying my invention. Fig. 2 isa top plan view thereof. Fig. 3 is a section on the line 3 3 of Fig. 2,and Fig. 4 is a detail section on the line 4 4 of Fig. 2.

The object of my invention is to provide a pencil-sharpener which, amongother qualities, will possess those of simplicity of construction andefliciency in and ease of operation and to these ends my inventionconsists in the pencil-sharpener having the construction substantiallyas hereinafter specified and claimed.

In the embodiment of my invention which I have selected for illustrationI employ a comparatively shallow oblong box A, which constitutes both asupport for the cutter B, which consists of a disk, and a receptacle forthe shavings or cuttings, the bottom I) of the box being readilydetachable to permit the emptying out of it of the shavings or cuttingswhen desired.

The disk-form cutter B has its circumference sharpened, and it ispivoted or j ournaled to the under side of the top of the box A, so thatit may be turned freely, and to avoid friction and insure its freeturning balls D are interposed between the upper side of the disk cutterand the top of the box. In the top of the box A there is an opening E,that exposes a portion of the edge of the disk cutter B, and saidopening is elongated or in the form of a slot, and its long sides extendoblique to the disk cutter. Overlying the disk cutter and extending froma point just within its cutting edge and upward and outward is aninclined surface F, that lies between extensions of the long sides ofthe opening E, which inclined surface F forms a table or rest for thepencil to be sharpened.

In sharpening a pencil the end thereof is placed within the opening Eand against the exposed cutting edge of the disk cutter and also againstthe long side of the opening farthest from the axis of the disk cutterand the pencil drawn outward. As the direction of movement of the pencilis in a path that is oblique to a radius of the cutter disk thatintersects such path at the circumference of the disk, the latter beingfree to turn will revolve so that the cutting of the pencil is due bothto the drawing of the pencil over the cutter and the revolution of thelatter. Besides assisting in the cutting operation the revolution of thedisk cutter, as described, is useful as presenting another portion ofthe cutting edge of the disk cutter in position for a succeeding cut.

In order to form a lateral support for the point of the pencil andprevent the breaking of the lead, the side wall of the slot againstwhich the pencil is held is extended downward in the form of a lug 6adjacent the disk cutter.

It will be evident that by the use of my pencil-sharpener a pencil canbe sharpened quickly and satisfactorily and without breakage of thelead, and as its construction is extremely simple its cost ofmanufacture will be low and it cannot get out of order. As the cutterhas an edge formed on the periphery of a disk and as the latter revolvesso that new portions of the cutting edge are presented for use, thedevice can be used a long time before a new cutter or resharpening of itis necessary.

Of course it is to be understood that the precise construction andarrangement of parts shown and described is not essential to obtainingthe advantages of my invention, for these may be secured in differentforms of embodiment.

Having thus described my invention, what I claim is 1. Apencil-sharpener, comprising a pivoted cutter free to turn on its pivotby the engagement of the pencil with the cutter and an obliquely-lyingpencil-guide.

2. A pencil-sharpener, comprising a pivoted disk and an obliquely-lyingpencil-guide said disk being free to turn under the pres sure of thepencil thereon.

3. A pencil-sharpener, comprising a revo luble cutter, and a support forthe latter, having an opening for a pencil that has pencilguidingsurfaces that are oblique with reference to the cutter.

4. A pencil-sharpener, comprising a box having an opening, and adisk-form cutter pivoted within the box, and having a portion of itsedge exposed by said opening, the direction of the opening being obliquerelative lateral pencil supporting surface adjacent to the cutter. theedge of the cutter. 1o 5. A pencil-sharpener, comprising a revo- Intestimony that I claim the foregoing I luble cutter, a support for saidcutter, antihave hereunto set my hand. 5 friction-bearings between thecutter and the WILLIAM B. HOPKINS.

support, and an oblique pencil-guide. Witnesses:

6. A pencil-shar ener, comprising a revo- WOOLFOLK HENDERSON,

luble cutter, an ob ique pencil-guide, and a B. M. HOPKINS.

